TOKYO: SoftBank Group Corp’s semiconductor unit Arm Ltd is targeting an initial public offering at a valuation of between $60 billion and $70 billion as soon as September, a sign of bullish interest in artificial-intelligence chips, according to people familiar with the matter. The roadshow is scheduled to start the first week of September with pricing for the IPO the following week, said one of the people, asking not to be named because the talks are private. The latest target for Arm’s valuation underscores a shift in market...